SC is SO awesome for vego food! Beans and lentils cooked from dried are waaaaaaay tastier and four times cheaper than the canned stuff, and better for you with much less sodium.
The other night I did a potato leek and cannellini bean soup in there. No quantities, really. Chucked in two good handfuls of dry beans, 1 leek, sliced, and four massive potatoes, peeled and chopped. Add stock until everything is covered +2cm on top. (was 2L in my case) Left it on "Auto" for 20 hours - you could do less, but we were particularly organised on this occasion. Came home, and the leek had completely disintegrated, the starch from the potato has all stretche dout and made it beautifully creamy, and the beans were so soft they were falling apart. Yumptious.

I think there are more vego SC recipes in the original Vegetarian Chatter thread.

Basics:
I think in the early days I used recipes, but now I just do it by feel.
If you have an "Auto" setting, then it is far and away the best as it sort of cooks by thermostat and will come on and off to maintain a constant temperature. High and low just get hotter and hotter. If we leave it one while we're out at work, we usually put in more liquid than necessary, on Auto, then flick it to High with the lide off for an hour before we eat.
Liquids - I use homemade vegie stock, sometimes wine, tomatoes, tomato juice, vegie juice, Massel chicken style stock powder (vegan) I don't use canned soups because I don't like the sugary taste of them.